Heres a few links to places I've used in the past where I've had parts etc from for various diy projects
Also any other interesting diy links in no particular order

Decibel Dungeon, this is the actual site that first got me into diy, lots of interesting stuff on there especially for those wanting a bash at Chipamps http://myweb.tiscali.co.uk/nuukspot/decdun/

AYA dac designed by Pedja Rogic, The bare pcb was brought from here http://www.pedjarogic.com/ (no longer running) He now owns this company selling half kits and fully built dacs http://www.audialonline.com/html/home.php
Pedja is a great chap to deal with, very helpful, highly recommended

Paul Hynes http://www.paulhynesdesign.com/ Got to be the best discrete regulators I've ever tried, recently used in the Sabre based dac

ALW super regs , bare pcbs or fully built regs can be brought here http://www.at-view.co.uk/alwsr.htm , they also sell the SB+ (based on a hghly modified Squeezebox) I've not heard the SB+ but its reported to be very good

Twisted Pear Audio http://www.twistedpearaudio.com/news.aspx Dac modules, amps etc

Avondale Audio http://avondaleaudio.com/ Nice range of diy modules and ready built kit

World Design http://wduk.worldomain.net/ Nice valve amp kits, also have an excellent forum

Hypex http://www.hypex.nl/ UCD modules

Shiny metal, http://www.ezdiyaudio.com/ I got the PCM1794 based dac pcb from here, as far as I know they only sell bare pcbs

Audiocom http://www.audiocominternational.com/

RS http://uk.rs-online.com/web/

Farnell http://www.farnell.com/

Cricklewood electronics http://www.cricklewoodelectronics.co...ewood/home.php